AU2003265695A1 - Acoustic wave sensor with emat drive - Google Patents

Acoustic wave sensor with emat drive

Info

Publication number
AU2003265695A1
AU2003265695A1 AU2003265695A AU2003265695A AU2003265695A1 AU 2003265695 A1 AU2003265695 A1 AU 2003265695A1 AU 2003265695 A AU2003265695 A AU 2003265695A AU 2003265695 A AU2003265695 A AU 2003265695A AU 2003265695 A1 AU2003265695 A1 AU 2003265695A1
Authority
AU
Australia
Prior art keywords
acoustic wave
cavity
wave sensor
emat
drive
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
AU2003265695A
Other versions
AU2003265695A8 (en
Inventor
Terence J. Knowles
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TexZec Inc
Original Assignee
TexZec Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by TexZec Inc filed Critical TexZec Inc
Publication of AU2003265695A1 publication Critical patent/AU2003265695A1/en
Publication of AU2003265695A8 publication Critical patent/AU2003265695A8/en
Abandoned legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
    • H03K17/96—Touch switches
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K2217/00—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00
    • H03K2217/94—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00 characterised by the way in which the control signal is generated
    • H03K2217/96—Touch switches
    • H03K2217/96003—Touch switches using acoustic waves, e.g. ultrasound
    • H03K2217/96011—Touch switches using acoustic waves, e.g. ultrasound with propagation, SAW or BAW

Landscapes

  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
  • Electrophonic Musical Instruments (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)

Abstract

An acoustic wave sensor includes an electromagnetic acoustic transducer to generate a resonant acoustic wave substantially trapped in an acoustic wave cavity. The acoustic wave cavity is defined by a radially symmetric raised surface. The electromagnetic acoustic transducer includes a spiral primary coil to generate the acoustic wave in the acoustic wave cavity and a concentric spiral pickup coil to pick up an electrical signal representing the acoustic wave in the cavity. A noise canceling coil portion is used to cancel spurious noise induced by the primary coil from the pickup coil to provide an output signal representing the acoustic wave energy in the cavity 12.
AU2003265695A 2002-09-17 2003-08-27 Acoustic wave sensor with emat drive Abandoned AU2003265695A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US10/245,246 2002-09-17
US10/245,246 US6933932B2 (en) 2002-09-17 2002-09-17 Acoustic wave sensor with EMAT drive
PCT/US2003/026712 WO2004027991A2 (en) 2002-09-17 2003-08-27 Acoustic wave sensor with emat drive

Publications (2)

Publication Number Publication Date
AU2003265695A1 true AU2003265695A1 (en) 2004-04-08
AU2003265695A8 AU2003265695A8 (en) 2004-04-08

Family

ID=31992077

Family Applications (1)

Application Number Title Priority Date Filing Date
AU2003265695A Abandoned AU2003265695A1 (en) 2002-09-17 2003-08-27 Acoustic wave sensor with emat drive

Country Status (5)

Country Link
US (1) US6933932B2 (en)
EP (1) EP1547243B1 (en)
AT (1) ATE520202T1 (en)
AU (1) AU2003265695A1 (en)
WO (1) WO2004027991A2 (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7307627B2 (en) * 2003-05-12 2007-12-11 Illinois Tool Works, Inc. Individual acoustic wave switch
JP2006100869A (en) * 2004-09-28 2006-04-13 Sony Corp Sound signal processing apparatus and sound signal processing method
US20070041606A1 (en) * 2005-08-22 2007-02-22 David Clark Company Incorporated Apparatus and method for noise cancellation in communication headset using dual-coil speaker
WO2007056598A1 (en) * 2005-11-14 2007-05-18 Illinois Tool Works Inc. Accelerator/brake control using acoustic sensing
US7843363B2 (en) * 2007-07-12 2010-11-30 Rosemount Aerospace Inc. Mechanical latch locking detection sensors
US7661321B2 (en) * 2007-09-25 2010-02-16 Rosemount Aerospace Inc. Force sensing clevis insert
US20090078688A1 (en) * 2007-09-26 2009-03-26 Illinois Tool Works Inc. System and method of operating a welding gun
US8152201B2 (en) * 2007-10-25 2012-04-10 Illinois Tool Works, Inc. Ground support system
US9490804B2 (en) 2011-09-28 2016-11-08 Cypress Semiconductor Corporation Capacitance sensing circuits, methods and systems having conductive touch surface
WO2013192536A1 (en) 2012-06-21 2013-12-27 Spectrum Sales & Service, Llc System and method for subsea inspection
RU2656134C2 (en) * 2016-11-22 2018-05-31 Акционерное общество "Диаконт" Electromagnetic-acoustic transducer
US10282957B1 (en) * 2017-12-06 2019-05-07 The Boeing Company Overheat detection systems and methods
WO2020041403A1 (en) * 2018-08-22 2020-02-27 Georgia Tech Research Corporation Flexible sensing interface systems and methods
FR3116337B1 (en) * 2020-11-17 2022-12-09 Commissariat Energie Atomique Device for non-destructive testing of a structure, comprising an electromagnetic noise reduction device

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4242541A (en) 1977-12-22 1980-12-30 Olympus Optical Co., Ltd. Composite type acoustic transducer
US5073878A (en) * 1990-10-31 1991-12-17 Cyber Scientific Circuit for driving an acoustic transducer
US5450305A (en) * 1991-08-12 1995-09-12 Auckland Uniservices Limited Resonant power supplies
US5434372A (en) * 1993-08-19 1995-07-18 Acer Peripherals, Inc. Position detecting apparatus with coils of opposite loop direction
TW241352B (en) * 1994-03-30 1995-02-21 Whitaker Corp Reflective mode ultrasonic touch sensitive switch
US6119522A (en) 1994-08-02 2000-09-19 The United States Of America As Represented By The Secretary Of Commerce Electromagnetic acoustic transducer and methods of determining physical properties of cylindrical bodies using an electromagnetic acoustic transducer
US5895856A (en) 1994-08-02 1999-04-20 The United States Of America As Represented By The Secretary Of Commerce Electromagnetic acoustic transducer and methods of determining physical properties of cylindrical bodies using an electromagnetic acoustic transducer
US5811682A (en) * 1995-12-13 1998-09-22 Ebara Corporation Electromagnetic acoustic transducer EMAT and inspection system with EMAR
US5813280A (en) 1996-07-02 1998-09-29 The United States Of America As Represented By The Secretary Of Commerce Acoustic resonator for measuring force
US5852261A (en) * 1996-08-09 1998-12-22 Toda; Kohji Surface acoustic wave touch-position sensing device
GB9620138D0 (en) * 1996-09-27 1996-11-13 Mansfield Peter Active control of acoustic output in gradient coils
US5808202A (en) 1997-04-04 1998-09-15 Passarelli, Jr.; Frank Electromagnetic acoustic transducer flaw detection apparatus
US6393921B1 (en) * 1999-05-13 2002-05-28 University Of Kentucky Research Foundation Magnetoelastic sensing apparatus and method for remote pressure query of an environment
US20020126103A1 (en) * 2001-01-18 2002-09-12 Knowles Terence J. Acoustic wave touch actuated switch

Also Published As

Publication number Publication date
WO2004027991A3 (en) 2004-10-21
ATE520202T1 (en) 2011-08-15
EP1547243A2 (en) 2005-06-29
EP1547243A4 (en) 2010-02-24
WO2004027991A2 (en) 2004-04-01
US20040051701A1 (en) 2004-03-18
EP1547243B1 (en) 2011-08-10
AU2003265695A8 (en) 2004-04-08
US6933932B2 (en) 2005-08-23

Similar Documents

Publication Publication Date Title
AU2003265695A1 (en) Acoustic wave sensor with emat drive
WO2006047042A3 (en) Piezoelectric isolating transformer
CN101642405B (en) Ultrasonic blind guide method and portable ultrasonic blind guide device thereof
CN103069347B (en) Tap sensitive alarm clock
AU7684396A (en) Pick-up head for an electronic stethoscope
WO2005103873A3 (en) Acoustic touch sensor
DE60203999D1 (en) MICROPHONE UNIT WITH INTERNAL A / D-TRANSMITTER
CN106683652B (en) Piezoelectric flexible film electronic organ
WO2005006242A3 (en) Acoustic touch sensor with low-profile diffractive grating transducer assembly
IL140997A0 (en) Loudspeaker drive unit having a resonant panel-form member
JP2002504221A5 (en)
WO2005006271A3 (en) Acoustic wave ice and water detector
AU2002356336A1 (en) Detection of sound waves produced by a musical instrument
WO2005006272A3 (en) Torsional acoustic wave sensor
EP0322679A3 (en) Acoustic apparatus
WO2003009219A3 (en) Electronic article comprising loudspeaker & touch pad
JP2005500725A5 (en)
WO2004102143A3 (en) Individual acoustic wave switch
WO2002051201A3 (en) Multi-functional vibro-acoustic device
CN2152613Y (en) Airspace harmonic wave enhanced air medium ultrasonic transducer
AU7935700A (en) Keyboard comprising a loudspeaker
KR100883052B1 (en) Wireless microphone
CN114974172A (en) Method for enhancing resonance effect of piano sound source plate
SU796751A2 (en) Low-frequency separately combined transducer
JPH07274279A (en) Ultrasonic wave hydrophone

Legal Events

Date Code Title Description
MK6 Application lapsed section 142(2)(f)/reg. 8.3(3) - pct applic. not entering national phase